I kind of get what you mean and, while I think the way you've worded it is a bit cold and dehumanizing, I'm inclined to agree since I'm much more interested in what people do and how they act than what clothes they wear or whatever label they decide to brand themselves with.
At the same time... You don't have to deeply care about how people see themselves in order to value their right to express themselves or be the person they want to be.
I have friends who transitioned from male to female. I still think of them as the same person and I don't really care how they dress or what their personal anatomy is like, but I do feel proud and happy for them that they are living their best and working towards being the person they want to be, in the same way that I would feel good about myself if I lost that extra weight or whatever.
In other words, the clothes people wear, what genitalia they have, or what pronouns they label themselves with may be totally superficial and unimportant, but the happiness and authenticity that comes from living freely and being the person who you want to be are real and, I think, really important.